By-pass check valve for sprinkler systems



July 9, 1929. AL c. ROWLEY BY-PASS CHECK VALVE FOR SPRINKLER SYSTEMSFiled March 1925 3 Shets-Sheet l Jul 9,1929. A. c. ROWLEY 1.72o.444

BY-PASS CHECK VALVE FOR SPRINKLER SYSTEMS Filed March 5, 1925 v 3 Shets-Shee't. 9

j xx WP. 6

5 %H y g July 9, 1929. A. c. ROWLEY 1,720,444 I BY-PAS CHECK VALVE FORSPRINKLER SYSTEMS Filed March' 1925 3 Sheets-Sheet 3 Patehted July 9,

UNETED steme ARTHUR C. BOX/VEZET, OF PEILAEELFHIA, PENNSYLVA' MALTE@ SJEr IGNUR TO GLOBE AUTU- IWLER COMPANY, OF PM' PECMIfl-'YLVAHIA, A CURPURABY-PAE- CHE-CK VAL'VB] FOR SPHIHKLEE Application filed March 5, 1825.

This invention rehites to sprinhier and sin'iihtr systems.

The inventon resides in the provi ion of a novel ;hirin of check Volvocohstructed to exert ;i predete'mihed ciosing :force when in the closedposition and it ieeser :Force tend: ing' to close the VitiVC etter ithiti* once heeh opened.

.In the atteched drmvmgzs: Figur@ 1 it VCl'lCLi section through :L

Volvo mode in accordmce With my ,ihren-- timi :showing the Volvo closed;

Figur 2 is o section shnderto thot shown in F'ig. 1 showing thevztiveopen and h'igore 3 .is e pizhi View of the Volvo.

With reference to the drewinge, the vzive muy conp'ise the usuei co-ainJ having mein 'mlet and outiet porte 2 a d 3 ;Jeepeo ti'vely and in theinterierthereot s for the vaive or chipper :3. The ci pper as in thestmdu'd form of check VliVm i carried by e ivxhf (i which ewhgupon shutt7 whose ende :rre suitehiy si in the casing l. The ende of th i thepresent nstzince aire supported i stude 8, 8 threztded into oppositeSititE- en -;ing The lever 6 in the p hee integral therewith andextendhig ti are- 'rom arms 9, 9, to the enter ende ot rv'hich ispivoteliy Secured e Weight 10, Seid Weight having ot its real' luge 1111. openinggs into which are threeded holts 12, 12, whose inner ende orelodged in suitable heering apertu'ree in the arms 9, 9, therehtcoihatiutih tr nnioiis 'for the Weight. The wei e ly 10 also heeprojecting ITNLNRTM'" &pae-ed arme 13; 13, which lie in'terme:ii'` iearms 9, 9, of the iever G, and which here wimectei thereto by means of epin 145 a hhh l* which is cormectcd pivotzilly, through a pin l& to itmember 17 011 the shutt 7 seid meniher lying intermediate the inner endeof the arms 9, 9, ass shown in Fig. 3 and normally hearing: against theadjoce't Wall of casing 1.

The eaeing l also comprises, one on either i e of the valve When theletter ie closed, porte 18 and 19 'which may he (BOIHEG' spectiveiythrough eui'tohe pipo lihet-9: 20 and 21 to the intake and outetopeninge of a standard Smail size meter 22, the .meter thus being placedon e by-p ss.

In operatiom the valve may he installed in 'the mein supply line of :1sprinhler or of the sent metonce Serial Ne. 13,262.

other system. Normaliy the system filled with Water, and under thesecircumstmices the pressure being hahmeed the Votre 5 wi rest upon itsseat i. in this position ot the mire, shown iii 1, theweight 1.0 ua&nimee a position in Which its center of grzwity lies weil outside the&Kis of the pivot PIIS 12; that is, on the side ot said pivot pine &voyfrom the zxiset the shorti'- T upon which the chpper is pivoted. TheWeight ie rettined in. this position through the link 15 and the member17 which as previonsly described eare against the weil of the cm:- ing,the .linit 15 'Eorming With the arms 13, 13, of the Weight n, toggewhich while pretontie; the weight 'from iovinc down- WM'dij -J aroundits pivote 2 ieyond the, position in which it is shown ne supported 'inFier. 1, stiii per-mite :i movement of the Weight iii 'the reversedirection or toward the shet t 7', hereinettcr deecrihcd. hide-r 'theseconditions, the resssure of the We' u* to :mont min the Volvo tipo: itsis moteri&11.3 teater 'thon its: octuii w( by re& son of the athantzgeous ieverage re- 'uithg 'from oviri'aneing Suspended 'gosztion,and hy reason further of the :haet thot the pressure of the member 10upon the Vaive due to its weight and to its zidvmtzgeous position Withrespect to the mire pivot h; s'tpplemented hy the reection ot the memberthrough the lirlmge 15-17 With the weil oti? the casing. ?in other werdethe at rongement io such 'thot the preestrre exerted upon the casng hythe Weight meniher through the porte 15 ::and 17 oppoeee elen-- ton ofthe vulve :md ;moments the normat preseure of the member 10.

tVith the miive closed, ;my email q entity of Water either duwn from thesprinkier system purposely ei' aceidehtoliy looking from the system Wilpas& through the hy*- pass and the meter 22, and the amount of euch flowWill be registered thereon. The maximum permiseehhmnount of suchWithdroWatl before creeting euch aii i'iihehmce es to tend to unset theVolvo magot ermree, Je regula'ted by the size of the weight 10 althoughit is ohvious that the ciosiig preesure must not exceed under any eireuhstances the pressure of the main.

In the event oi' fire, the Sudden opening:: of the sprinkiers couees thepressure ot the mein to throw open the Volvo 5, and when se opened, theaforedescribed link is such as tobring the weight lO into the positionshown in' Fg. 2. It will be apparent under these circumstances that thecenter of gravity of the weight is carried back to a position in avertical plane intermediate the pivot pins 12, 12, and the axis ot theshaft 7, or considerably nearer the latter axis than before, whereby thepressure of the weight tendng to close the valve is materially recluced,the aforesaid reaction and advantageous leverage being entirelyeliminated. Under these circumstances, the frictional opposition of thevalve to the free passage o' the water is reduced to that caused only bythe actual weight of' the parts.

I claim:

l. In a check valve, a casing, a Valve seat therein, a elapper movablysupported in the casng and cooperating with the valve seat, a weightsupported by the elapper and thereby exerting a normal pressure tending`to hold the elapper on the seat, and means :tor reacting the Weight Withthe wall of the casing to create' an additional pressure on the elapperaugmenting said normal pressure.

2. In a check valve, a casing, a valve seat therein, a elapper movablysupported in the casing and cooperating with the valve seat, a we 'htsupported by the elapper and thereby exerting a normal pressure tendingto hold the elapper on the seat, and a system of links operativelyconnected with the weight through which the latter reacts with the wallof the casing to thereby create an addition al pressure 'on the elapperaugmenting said normal pressure.

3. In a check valve, a casing, a Valve seat therein a elapper novablySupported in the casing and cooperatng with the valve seat, a weightpivotally mountecl on the elapper' and thereby exerting a normalpressure tending to hold the elapper on the seat, a member pivotallymounted within the casing adjacent the Wall thereof, and a linkconnecting the weight With said member Whereby the Weight may reaet withthe wall of the casing to create an additional pressure on the elapperaugmenting said normal pressure.

4:. In a check valve, a casing, a valve seat thei-ein a elapperpivo'ally supported in the casing and cooperating,` with the Valve seat,a weight pvotally mounted on the elapper and thereby exerting a nornizlpressnre tend- ,ng to hold the elapper on the seat, a member having apivotal mounting corresponding with the axis of the elapper pivot andadapted to engage the wall of the csing, and a link interconnecting theweight with said member whereby the weight may reaet with the wall ofthe casing to therehy create an additional pressurc on the elapperaugmenting said normal prcssure.

5. In a check Valve, a casing, a Valve seat therein, a elapper movablysupported in the casing and cooperating with the mln seat a weightsupported by the elapper and thereby exerting a normal pressure tendin;`io hold the elapper on the seat, and means operative only when theelapper ir on the Seat tor reacting the weight with the wall ot thecasing` to create an additionnl p'css'll'e on the elapper' augmentingsaid normal pressure.

G. In a check valve, a casing, a valre seat therein, a elapper movablysupptn'ted in the casing and cooperating` with the Vnlre seat, weightedmeans supported by the elapper and thereby exerting a pressurc {endingto hold the elapper on the seat and to return the elapper to the seatfrom an elctzted position, and means operatively connected with saidweight for augmenting said normal pressure when the elapper on the seat.

7. In a check valve, a casing, a 'llYC seat therein, a elapper movablyuipported in the casng and eooperating with the Valve sent, weightedmeans supported by the elapper and thereby exerting a pressure tendingto hold the elapper on the seat and to return the elapper to the seatfrom an clevated position, means operatirely connected with said weight:for creating nn additienl pressure augmenting said normal pressnre whenthe elapper is on the seat, and means for automatically releving saidadditionzl pressure when the elapper is elerated to a predeterminedextent from said seat.

ARTHUR C. ROXVLEY.

